Ammonium bisulfide, NH4HS, forms ammonia, NH3, and hydrogen sulfide, H2S, through the reaction

NH4HS(s)?NH3(g)+H2S(g)

This reaction has a Kp value of 0.120 at 25 ?C. An empty 5.00-L flask is charged with 0.300g of pure H2S(g), at 25 ?C.

C) What are the partial pressures of NH3 and H2S at equilibrium, that is, what are the values of PNH3 and PH2S, respectively?

D) What is the mole fraction, x, of H2S in the gas mixture at equilibrium?

E) What is the minimum mass of NH4HS that must be added to the 5.00-L flask when charged with the 0.300g of pure H2S(g), at 25 ?C to achieve equilibrium?

Determine the pH for each of the following solutions:

a)A 300. mL solution of 18.4 mM HNO3

b)A 125 mL solution of 2.94 M cyclohexylamine

c)A 500. mL solution of 1.37×10–7 M Ca(OH)2

d)A 50.0 mL solution of 53.5 mM dilithium citrate

e)A mixture made with 50.00 mL of 74.2 mM 2,3-dimercaptopropanol,

and 20.00 mL of 209 mM potassium hydroxide

Calculate the pH of the following solutions: (a) 10-3 M HClO4 (note that for HClO4 the pKa = -7) (b) 10-3 M HOCl (note that for HOCl the pKa =7.52) (x) 10-6.5 M NaOH (d) 10-3 M NH4Cl (note that for NH4+ the pKa =9.25)

A 0.15 g sample of a purified protein is dissolved in water to 2.0ml of solution. The osmotic pressure is found to be 18.6 torr. Calculate the molar mass of the protein.

Consider the following reaction:
HC2H3O2(aq)+H2O(l)⇌H3O+(aq)+C2H3O−2(aq)
Kc=1.8×10−5 at 25∘C

If a solution initially contains 0.180 M HC2H3O2H, what is the equilibrium concentration of H3O+ at 25∘C∘C?

A fictional company has been producing propene oxide, C3H6O, from propene, C3H6, with a 96.0%yield. The process requires the use of a compound called m-chloroperoxybenzoic acid, C7H5O3Cl, which can be abbreviated as mCPBA. The entire reaction takes place in the solvent dichloromethane, CH2Cl2:

C3H6+C7H5O3ClCH2Cl2????96.0% yieldC3H6O+C7H5O2Cl

The initial propene concentration in the solvent is 21.0 g/L.

Consider the prices of the following substances.

Also consider that the cost of waste disposal is $5.00 per kilogram of propene oxide produced.

Part A

A relatively simple way of estimating profit is to consider the the difference between the cost (the total spent on materials and waste disposal) and the earnings (the price at which the product can be sold).

Calculate the profit from producing 32.00kg of propene oxide.

Express your answer numerically in dollars using three significant figures

The company is developing a "greener" method of making propene oxide from propene using hydrogen peroxide, H2O2, in supercritical water with a vanadium catalyst. In the reaction 1.00 kg of vanadium catalyst and 32.0 kg of water are used for each kilogram of propene. 75 % of the vanadium catalyst can be collected and reused in a subsequent batch:

C3H6+H2O2V, H2O????89.0% yieldC3H6O+H2O

Consider the prices of the following substances.

There is virtually no waste produced with this green process and there is no waste disposal fee, but the yield is only 89.0%.

Part B

Calculate the profit from producing 32.00kg of propene oxide by this alternative green process.

Express your answer numerically in dollars using three significant figures.

What are referred to as ‘particles’ in cryo-EM of proteins?

if an ATP molecule is hydrolyzed (by two water molecules) all the way to AMP (and two Pi) in two steps, how many total kcal/mol of energy could be released? Explain.

Using this equation.

ADP + H2O -> AMP + Pi + 7.3 kcal/mo

A mixture initially contains A, B, and C in the following concentrations: [A] = 0.400M , [B] = 0.700M , and [C] = 0.700M . The following reaction occurs and equilibrium is established:

A+2B?C

At equilibrium, [A] = 0.210M and [C] = 0.890M . Calculate the value of the equilibrium constant, Kc.

Express your answer numerically.

1. Net ionic equationCr(OH)3+ HO2+-----given-----(CrO4)2+ + HO-

2. Cd⁄Cd2+(0.060mol/l) // Ag / Ag+(2.50mol/l)#

a)Overallreaction

b)Cell potential

c)Which one is the positive meta

1.

a) Account for the fact that there are four different types of H atoms (four non-equivalent H types) in propene.

b) Explain why the NMR spectrum of cyclohexane,below, at room temperature gives one broad peak for all 12 protons instead of two seperate peaks for the axial and equatorial hydrogens

Can someone explain to me why does increasing the electrolyte concentration can increase the electroplating rate/or metal deposit...? Take copper sulphate as an example. Better explanation with pics...And just don't go too far beyond the Faraday's law and please try to explain it in a more 'Chemistry' way. Thanks!

3. ADP-Glc pyrophosphorylase (AGPase) is a key enzyme in the biosynthesis of starch. Using AGPase as an example, describe how the regulation of this one enzyme can control the overall flux of carbon through starch biosynthesis in photosynthetic tissue.